Calculator.



PATENTED GCT. 29. 1907.

G. H. OGUMPAUGH.

CALCULATOR.

APPLIOATION FILED APn.2a.19o2.

2 SHEETS-SHEET 1.

Q/vihwooeo ff I rHE NMR/s PETERS ca.. wAsumcraN, v4 c PATBNTD 00129, 1907.

C. H. OCUMPAUGH. CALCULATOR.

APPLIUATION FILED APn.2a.19o2.

:sums-SHEET 2.

CHARLES H. OOUMPAUGH, OF ROCHESTER, NEW YORK.

CALCULATOR.

No. 869,511Y

Specification of Letters Patent.

Patented Oct. 29, 1907.

Application tiled April 28. 1902. Serial No. 105.066.

To all yi/fzom. it may concern:

Be it; known that l, Cuantos II. OCUMraUoH, a resident ol' Rochester, in the county ol Monroe and State ol' New York` have invented certain new and usetul Improvements in Calculators: and I do hereby declare the t'ollowing to be a lull, clear, and exact description ot the invention, such as will enable others skilled in the art to which it pertains to make and use the same,

The invention relates to calculators, and has.i`or its object to indicate arithmetical operations by mechanical means in a simple, convenient, and certain manner.

"he inven on ts in the construction herein described and pointed out.

ln the accompanying' drawing, .Figure l is a broken plan ol the improved device; Fig 2 is a section online 2-2 ol' lrig. i; Fig. C?, is a partial broken plan, the

ssumcd to be in normal situation and the tace plate removed; Fig. 4 isa perspective view, with a party broken away` showing a modification; l"ig. 5 is a plan view. with apart broken away, showing' another mtn'litication; and Fig. (i is a section on line tt ol Fig. 5.

reference letter indicates a iront or lace plate, and D a back plate or base, which plates may be connected in any suitable or convenient manner, but so as to leave between them space lor the manipulation ol the inclosed series ol slides or sliding stripsB and C. These may be held and guided in any convenient manner as, lor examj'ile, by suitable slots E in the [langes l ol' the base plate. l

G denotes stops, and Il handles, on the slides. The individual numbers ol each series are arranged at an angle with those ol the other series, the arrangement in the present'. instance being at right angles.

The lace and back plate constitute a case, one ol the plates being prel'erably provided with flanges slotted to receive the slides which extend entirely through the case and are provided each with a stop adapted to bear on the exterior' edge ol the case and also with a handle adapted to stop the slide in like manner. The stop ot' any slide being removed it can be withdrawn lrom the case lor the substitution oi another, or ol the same alter it ha. been re-marked tor a different use.

The construction illustrated is adapted lor indicating the product ol any two desired or pre-arranged numbers, being noted one on each. ol two transversely movable slides, as, lor example, the product ot a number ol hours by a rate ol pay per hour. The ligures marked on the slides t", in the case illustrated, may be understood to denote rates ot wages per hour and those on the slides I3 numbers olli ours, and the device is adapted to correctly indicate the product oi any number that indicates hours into any number indicating wages per hour by suitably manipulating two appropriate transversely movable slides. Three slides indicating respectively three, ve and eight hours, and tive slides consi slides Il and tf being indicating respectively wage rates of from ten cents to lii'ty cents an hour, are shown, but the particular numbers and the particular' denominations are not essential, The invention, however, is primarily intended lor use in indicating correct amounts to be paid to employees. The majority ol' laborers are paid so that their timeis computed in fractions which requires complex andy tedious calculations. With my improved device, however, it is only necessary to move two slides, one representing' the number' of hours the laborer' has worked, and the other the amount he is to receive per hour, and the result is instantly shown, and as no other ligures appear there is no conlnsion. This device is adapted, however, to all kinds ol computations.

The tace plate A has series ol apertures o equal in number to the sum ot' the two series oi slides. These lace plate numbers are situated adjacent the point ol the intersection or overlapping ol' the slides, and each slide has series ot apertures or perl'orations any one ol which can be made to register with an aperture in the tace plate and with an aperture in a transverse slide properly moved to bring' it in alinement, with the ellect to disclose ligures on theback or base plate through the three alined openings.

Rel'erring to Fig. l., the slides C and BQ marked respectively 20 and 5, are shown moved to a situation to cause an aperture in each to register with numbers on the back plate corresponding to those ol' the respective slides, the product, 100, ot said numbers being indicated in proximity (that is, between the slide numbers) on the back plate disclosed by the same operation. Slide B/ remaining as shown, a similar' movement ol the slide ClV would disclose a product oi 250. Restoring B to its normal situation and moving B, C1" remaining unmoved, a product ol 400 would be disclosed-all as will be readily understood. It will also be understood that there is no limit to the number ol series ol slides, nor to the numbers, nor to the subject of the computations, and that the nature ol the calculations can be varied as, for example, to addition, subtraction or division. For greater' certainty and speed, the factors which are marked on the handles of the slides are also, together with their product, marked on the base plate, all to be exposed by suitable manipulation as explained, the product and the factors thereiore being visible at one glance. It is obvious in this construction that il one slide only is moved no ligure is disclosed, and that none are disclosed unless two slides are moved from normal position.

A grouping of the gures to show the product and a lactor at one glance and through one opening is adapted to other calculators and I consider it a valuable adjunct in a calculator and not limited to the construction shown.

The face plate A, the base plate, and the intermediate vertical side Walls constitute a case for the slides, and

atfordsmeans for guiding them, the slides projecting through the case walls for the purpose. Each slide is independently and directly movable. The apertures in each series of slides are equidistant, and an effective movement of a slide must equal the distance between the aperture centers in that particular slide. This distance is determined by the stops G. It a front plate is used the distance between its apertures must equal that between the aperture centers of the slide.

To adapt my calculator for various uses, provision is made for convenient change of the gures on the base or back plate either by the substitution of cards just above the base or by providing for a substitution of bases. Y

As indicated in Fig. 4, a space K is left immediately habove the top of the base or back plate for the insertion of a notation card, and a card-receiving slot I is provided to permit the insertion or removal of a card, which thereby becomes as respects the` notation a removable back plate. The gures on any card can be made in advance to agree with the particular arithmetical operation to' be indicated by moving the slides, and the stops G can be made removable to permit the slides to be removed, if found necessary or desirable, for the purpose of marking them. This enables the same calculator to be applied to various uses. In some cases instead of using removable cards the base may be made detachable Ieither for re-marking on its face or for the substitution of a different base previously marked.

Figs. 5 and l6 show a detached base having grooves L adapted to receive flanges M on one or more edges of the lower part of the body N of the calculator. O denotes screws to tix the parts together.

The term base plate is used herein to indicate a part Which may or may not be interchangeable, said part having inscribed thereon the results of previous calculations whether that part is an integral detachable base or a base having a detachable part inscribed as stated, the essential element being a notation plate or base whether made in one or more parts and whether detachable or not.

This calculator is adapted to show the results in addition, subtraction, multiplication or division or any of their various combinations. It is also adapted for question answering, for railroad time tables showing the positions of railroad trains at given times, and the results attained at a given time by any machinery in operation, etc., etc.,-in fact it can be used wherever needed to save time in calculating, and I do not wish to limit myself to the examples shown in the drawings.

I am aware that calculators have been provided with perforated slides movable transversely in grooves or guideways in a case, said case being provided with la-nges in the path ofthe slides, and also that removable charts or notation plates have been proposed. In my improved construction each slide is provided with an exterior removable stop and with a handle, each indicating the situation of the slide. Further when the stops are removed the slides can be readily withdrawn from the ease through the slots in the edge thereof no grooves being required in the body of the base plate for said slides. And further in my construction the use of a hinged or removable case cover for the introduction of a notation plateris avoided.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a calculator, the combination of a case, a removable back plate, transversely arranged series of perforated removable and numbered slides supported in the case above said plate and movable to cause these perfor-ations to register and expose the back plate, numbers on said plate denoting the numbers of the actuated slides and their product, said numbers beingexposed through the coincident perforations of said numbered slides, detachable stops for the slides, and means for securing the plate in operative situation, said means permittingI the removal of the plate.

In testimony whereof, l have signed this specification in tlie presence of two subscribing Witnesses.

CHARLES l-I. OCUMIAUGH.

Witnesses A. M. ZIMMER, GEORGE A. GILLnT'rE. 

